adds manifest.ttl in ./sparql/sparql12 as suggested in #122 (comment)

sparql/sparql12/manifest.ttl

@@ -0,0 +1,36 @@
+## [1] https://www.w3.org/Consortium/Legal/2008/04-testsuite-license
+## [2] https://www.w3.org/Consortium/Legal/2008/03-bsd-license
+
+PREFIX rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX rdfs:   <http://www.w3.org/2000/01/rdf-schema#>
+PREFIX mf:     <http://www.w3.org/2001/sw/DataAccess/tests/test-manifest#>
+PREFIX rdft:   <http://www.w3.org/ns/rdftest#>
+PREFIX trs:    <https://w3c.github.io/rdf-tests/rdf/rdf12#>
+PREFIX dct:    <http://purl.org/dc/terms/>
+PREFIX xsd:    <http://www.w3.org/2001/XMLSchema#>
+PREFIX foaf:   <http://xmlns.com/foaf/0.1/>
+PREFIX skos:    <http://www.w3.org/2004/02/skos/core#>
+
+trs:manifest  rdf:type mf:Manifest ;
+  rdfs:label "SPARQL 1.2 tests"@en ;
+  skos:prefLabel "La suite des tests pour SPARQL 1.2"@fr;
+  skos:prefLabel "Conjunto de pruebas para SPARQL 1.2"@es;
+  dct:issued "2023-12-01"^^xsd:date ;
+  rdfs:seeAlso <https://w3c.github.io/rdf-tests/> ;
+  dct:modified "2023-12-01"^^xsd:date ;
+  dct:licence <https://www.w3.org/Consortium/Legal/2008/03-bsd-license> ;
+  dct:creator [ foaf:homepage <https://w3c.github.io/rdf-star-wg/> ; foaf:name "W3C RDF-star Working Group" ] ;
+  rdfs:comment """
+    These test suites are a product of the [W3C RDF-star Working Group]() as
+    well as the RDF-star Interest Group within the W3C RDF-DEV Community Group,
+    and has been maintained by the
+    [RDF Test Curation Community Group](https://www.w3.org/community/rdf-tests/)
+    at [https://github.com/w3c/rdf-tests/tree/main/sparql/sparql12](https://github.com/w3c/rdf-tests/tree/main/sparql/sparql12/).
+
+    Conformance with SPARQL 1.2 specifications can be determined via
+    successfully running the tests for relevant specifications along
+    with the relevant SPARQL 1.1 tests.
+  """;
+  mf:include (
+    <grouping/manifest.ttl>
+  ) .